Module: AcceptsNestedIds::ClassMethods

Defined in:
lib/accepts_nested_ids.rb

Instance Method Summary collapse

Instance Method Details

#accepts_nested_ids_for(*args) ⇒ Object

Sets up defered save and dirty tracking for the specified associations

Examples:

When class_name can be inferred from association name

include AcceptsNestedIds
accepts_nested_ids_for :documents, :users

When class_name is different from association name

include AcceptsNestedIds
accepts_nested_ids_for :documents, included_users: "User"



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# File 'lib/accepts_nested_ids.rb', line 50

def accepts_nested_ids_for(*args)
  @_nested_id_associations = map_nested_id_associations(*args)

  nested_id_associations.each do |nested_id_association|

    # Define ids_attr getter
    #
    # @example Method definition
    #   def document_ids
    #     @document_ids || (documents.loaded? ? documents.map(&:id) : documents.pluck(:id))
    #   end
    #
    define_method("#{nested_id_association.ids_attr}") do
      association = send(nested_id_association.attr)
      instance_variable_get("@#{nested_id_association.ids_attr}") ||
        (association.loaded? ? association.map(&:id) : association.pluck(:id))
    end

    # Define ids_attr setter
    #
    # @example Method definition
    #   def document_ids=(value)
    #     return if document_ids == value
    #     attribute_will_change!('document_ids')
    #     @document_ids = value
    #   end
    #
    define_method("#{nested_id_association.ids_attr}=") do |value|
      return if send(nested_id_association.ids_attr) == value
      attribute_will_change!(nested_id_association.ids_attr)
      instance_variable_set("@#{nested_id_association.ids_attr}", value)
    end

  end
end

#nested_id_associations ⇒ Object 



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# File 'lib/accepts_nested_ids.rb', line 86

def nested_id_associations
  @_nested_id_associations || []
end